Well...I just found the answer to my own question. This board has a header the WiFi half mini card slides into, and then there is a threaded post on the motherboard which is what the supplied screw is for to secure it. This is different from the ASUS ROG Maximus VI Gene board, in that on the ASUS, there is a module that the wifi card goes into, and then that module snaps into the board. Also what is really nice about the ASRock board, is it has 3 holes drilled on the back plate for the newer cards with 3 antennas, whereas the ASUS board only has 2...which means you have to drill another hole for the 3rd antenna if you want to use the Killer-N 1202 board or Intel Ultimate-N 6300 board...or just cable tie the 3rd antenna somewhere inside the case...which of course is really cheezy.
So in my opinion, the ASRock board is better than the ASUS board in this regards. It also has more stuff than the ASUS, like an optional CPU fan header, among other things...now if they would only start installing old style Firewire 1394 headers!
Just reporting back if any body is interested...thanks.